Size:about 6mm in width,U choice diameter size Size Reference 6 size=16mm in diameter 7 size=17mm in diameter 8 size=18mm in diameter 9 size=19mm in diameter 10 size=20mm in diameter 1.Order < $5,NO Tracking
2.Order>=5,with a tracking number & International shipping information
China Post Registered Air Mail,or Epacket (USA) And other Shipping Method, Can be tracked With a tracking number & International shipping information 3 . order >=$150/$200,free shipping by EPACKET,DHL EMS,FedEx,UPS,TNT,TOll (US, Australia and most of Europe) and so on You can contact to me for more information 
